Lock



June 24, 1930. H, GLASE'R 1,765,526

l LOCK Filed Dec. lO, 1928 2 Sheets-Sheet l ll 4' 5 f5 is ATTRNEY June 24, 1930. H @LASER 1,765,526

LOCK

Filed 1366.10, 1928 2 SheehS-Sheet 2 J'ZQ: 6. 3- 66 67 l 26 25 22 2f 28 am 2.9 n 28 23 @i2-r .ff/...A l @19. 25 22g INVENTOR las ATTORNEY Patented June 24, 1930 UNlTED STATES HERBERT GLASEB, F NEW YGBK, N. Y.

Application ma. member 1o, ieee. anni no. new.

This invention relates to an improvement in a lock primarily intended for use in connection with elevators. It has for its object the provision of such a loclr which shall be 5 of simple, sturdy construction yet extremely veiiicient and durable in operation.

The primary object therefore, .of the in vention is to provide a lock of the character mentioned which shall not only act as a lock or an'elevator shaft door but which will also act as a switch for the elevator-operat-y ing circuit` so Y:that operation of the elevator While the shaft door is open will be impossible.

A further object of the invention is to rovide a lock for elevator shaft doors in w 'ch 'the lock is capable of attachment to the door frame in several ways to accommodate both swinging and sliding doors or to accommodate the position in which an o erating cani may most suitably be attac ed to the elevator.

A further object of my invention is to provide a combined lock and switch in which V I utilize a novel 'form of circuit-closing device which is not only capable of long wear and use without adjustment, but -which makes a wiping contact thus assuring positivel electrical contact between the switch elements which it serves to connect. p

With these objectsy and such other ob'ects as may hereinafter appear, in view, I ave' devised the particular arrangement of parts hereinafter set forth and more particularly,

Reference is to be had to the accompanying drawing, forming a part yhereof in which Figure l is a front elevation of my im proved lock with the cover plate removed to disclose construction; i y

Figure 2 is a sectional view'on .the line 2 2 of Figure l, looking in the direction of the arrows;

Figure 3 is a sectional view on the line 3*-3 of Figure 1, looking in the direction of the arrows; v i

Figure 4 is a sectional view on the line 4-4 of Figure 1 looking in the direction of the arrows; n

Figure 5 is a sectlonal view similar to that shown in Figure 3, except that the actuating rod is shown positioned at right angles to its position in Figure 3;

'Figure 6 is a sectional view of a portion of an elevator shaft and door and diagram- 'o5 matically illustrating the position of the lock and its attendant parts when a swinging type of door is used;

v Figure 7 is a similar view showing the o-v sition of the lock and attendant parts wlgen $0 a sliding door is employed;

Figure 8 is a sectional view on the line 8- 8 of Figure 6, looking in the direction of the arrows.;

Figure 9 is a plan view of vthe lock meme $5' ber and circuit-c osing device with a portion of the same being broken away to disclose construction; and i Figure 10 is a transverse sectional view across the circuit-closing device forming a part of the structure shown in Figure 9.

Throughout the. various views of the drawings similar reference characters designate simi ar arts.

In the ein odiment of my invention dis- 75 *i closed in the accom anying drawing, l indicates the casing in which my imprmred lock mechanism is contained. The saine may be made of any. suitable metal and is. preferably rectangular iny orm and substane0 tially shallow in depth. At 2 is shown a cover plate which serves to close theicasing 1 andkeep the mechanism clean and free from dirt and dust. It also `prevents unauthorized persons from tampering with the mechanism contained within the casing.l

At 3 and i is shown a pair of electrical contact screws which secure in position a pair ci contact members 5 and 6. Eachof i thesecontaet members 5 and 6 comprises a 90 strip of metal having aibase portion 7 and an upwardly inclined tongue portion 8 having a rounded or 4curved outer surface against which a circuit-closin member is a apted to resiliently abut. T ese contacts 05 5 and 6 are mounted u on a strip of insula-l tion 9 which is secure to the base plate 10 of the casing l by suitable screws 11. The electrical circuit for operating the elevator is connected to the two contacts 5 and 6 by 100 means of wiring, a part of which is shownat 12 and 13, which wiring may enter into the casing 1 through any suitable openings provided therein for the purpose. Since the contacts 5 and 6 are spaced away from one another, it will be obvious that the same have to be' electrically connected by a` suitable conductor tol close the circuit between the wires 12 and 13 to permit operation of the elevator. A suitable circuit-closing member for this purpose is provided, the same now being described.

The side walls 14 and 15 of the casing 1 are provided with a pair of bosses 16 and 17 in which is mounted a pivot pin 18 which supports a rocking lever 19. This lever 19 is provided with a boss 20 through which the pivot pin 18 passes, the boss being capable of a rocking or oscillating movement on said pin as will be described. y

The lever 19 is provided with an integrally formed downwardly extending finger 20 which acts as a latch member for the elevator shaft door. `The lever 19 is also provided with an upwardly extendin arm portion 21 to which is secured a hollow casing 22, this casing bein secured in place on the arm 21 by a pair o screws 23.

At 24/ is showna lunger member inthe form of a block of insulation which is provided with a centrally located bore -25 in which ax coil spring 26 is seated. The coil spring 26 abuts a ainst the rear surface .27 of the part 21 of t e rocking lever and normally tends to thrust the insulated block 24 out of the casing 22.

The block 24 is restricted in' its outward movement by means of the wpins 23 which pass through apertures 28 formed in the insulated block 22. The apertures 2.8 are sufficiently enlarged to have a fair degreeof teral movement or play within the tubularcasing 22 so that the contact member justdescribed is self ali ning.

Yo the outer end of the b1ock'24 is secured a circuit-closing memberin the form of a 29, lthe Asame half-round metallic stri y a countersunk being yheld in position [screw 30 whichathreads into the end of the caused' to 'resilient y bear against -to electrically connect the two contacts 5 and 6, thus maintaining a Yclosed circuit.

B means of mechanism to be described, it will be seen that the lever 19 is caused to move `with an oscillating movement about its pivot 18 to swing 4the `contact member 29 outwardly toward the 'cover plate l2, to break the circuit between the contactv members'5and6.

A coil Yspring 31 bearing against the base permit the block to.l

plate 10 of the casing 1 enters into a recess in the linger 2() and normally tends to hold the circuit-closing member 29 in the position shown in Figures 1 and 2 so that the' circuit between the contact members 5 and 6 is normally kept closed.

At 32 is shown a plate which is secured to the elevator shaft door 65 (Figure 6) in a manner to be hereinafter described. Extending from the face of this plate is a hook shaped lock member 33 and a circuit-closing member 34. The circuit closing member 34 consists of alu 35 formed integral with the plate 33 an extending ou'twardly therefrom, and an insulating strip 36 secured to the ear 35 by screws 37 Alt the outer end of the insulating strip 36 is secured a roundedv metallic contact-making strip 38. When the door 65 is closed, the hook shaped member 33 enters into the casing 1 through an opening 39 provided in the side plate 15 of said casing and forms a hooked engagement about the latch member 20. Simultaneously with this engagement, the circuit closing member 38 abuts against and closes an electrical circuit between two flexible contacts 40 and 41. Y

Each of these contacts 40 and 41 is pivotally mounted at 42 in a pair of ears 43 and 44, these ears being mounted upon a strip of insulation 45, secured to the end plate 4g of the casing by suitable fastening screws 4 To prevent arcing between the two pairs of ears 43 and 44 and the contacts carried thereby, I provide an insulating rib or wall pressure of the circuit-closing member 38,`

by coil springs'50. Stops 50 are provided to limit the movement of these contact members in one direction.

The wiring of an electric circuit for operating a ltorque motor which operates a retirin cam secured to the elevator, is connecte to the contacts 51 and 52 as shown at 53 and 54. v Thus' when the circuit-closing member 38 abuts against the contacts 40 and 41, it acts to electrically connect the same and closes the circuit for operating the torque motor heretofore mentioned.

The boss 17 which is formed as part of the casing 1, is provided with a bore 55 extending through it; at right angles to the bore in which the pin 18 is fitted and an oscillating rod or shaft 56 is mounted in said bore 55 to freely move therein. A portion of the rod 56 extends out beyond the back plate 10 of the casing and such projecting part is provided with a lever 57 on which is rotatably mounted a roller 58. The inner end of the' shaft or rod 56 is located within the casing and the same is provided with. a linger 59 terminating in a ball- :mousse shaped end 60. This ball shaped end exerts pressure on a projecting lug 61 provided on the boss 20 of the lever 19 to rock the lever about its axis 18 to break the circuit between the contacts 5 and 6 and to free the latch member 20 from its engagement with the hook 33. The rod '56 is provided with a suitable positioning stop in the form of a pin 85 and washer 86.

Through the construction just described, it will be seen'that when the lever 57 xed on the rod 56 is swung toward the right in Figure 1, theiin er 59 is depressed, the ball shaped end of le same exertin pressure upon the lug 6l, causing the roc 'ng lever 19 to be swung about its axis 18 against the pressure of the spring 31, so that the in er 20 is swung inwardly toward the rear p ate 10 and caused to free itself from its engage-` ment with the hook-shaped lock member 33. By this rocking action of the lever 19 the circuit-closing member 29 is simultaneously swun outwardly toward the plate 2 to open the clrcnit previously closed across the contacts 5 and 6. When pressure against the roller 58 is removed, the same swings back to its former position under the impulse of the sprinr 31 and restores the parts to the position disclosed in Fi res 1 and 2. The lever 19 is provided wit a stop 62 that abuts against a fixed projection 63 extending inwardly from the inner face of the rear plate 10 of the casing.

From the foregoing, the operation of rn improved lock will be readily understoo In Figure 6, I have shown the same as applied to an elevator shaft door opening, on which a swinging door is utilized. Here the door is shown at 65, the same being hinged at 66 to a door frame 67. The casing 1 containin the lock mechanism, is secured to the side o the door frame located opposite to the hinge 66 of the door, in the position substantially as shown in Figure 6. .When a Swingin door of the type shown in Figure 6 is uti zled, the plate 32 is secured to the face of the door and the casing '.1 so secured f to the door frame that when the door is closed, the plate will lit over and close the opening 39 in the casing 1 and-thus project the hooked lock member 33 and circuit-closing member 38 into the casing in the manner disclosed. in Figure 1.

At 68 is 'shown a portion of the elevator. The same carries a suitable plate 69` so located that a cam carried by said plate will act to operate against the roller 58 to unlock the door when theelevator is 'aligned with the door opening. The plate 69 carries a vretiring cam or shoe 70 which is pivotally lother flexible member-76 is securedy to the 'f door is open..

chain 4or cord 76 to hold the cam 70 in its raised position and out of contact with the roller 58. With the stopping of the elevator at a floor, 'the torque motorjust mentioned ceases its operation and consequently its pull upon the lexible member 76, permitting the cam 70 tol descend by gravity to its lowered position shown in Figure 8, its descent being limited by a suitable stop 78. Whilein this lowered position, the cam 70 is properly located to strike the roller 58, thus causing the lever 57 on which said roller is secured, to swing to the right, in Fi pivot the lever 18 about its axis 18 so that the linger 20' swings inwardly toward the plate l() of the casing, to free itself of engeageinent with the hook shaped lock memn r 33. Simultaneously, the circuit-closing member 29 is swung outwardly toward the plate 2 to open the connection between the contacts 4 and 5. lu other words, when the elevator reaches a door and stops at said door, the cam 70 becomes operative to swing the lever 20 inwardly as was heretofore described to tree the loclr member 68 so that the door may be manually opened.

It will be seen that, as was heretofore mentioned, the elevator operating circuit, extending'through the contacts 5 and 6 is y this peratiom'simultaneously opened. hns, w e the elevator-door 65 is open, it is impossible to operate the elevator. Simultaneousl with the opening-of the door, the circuit-c osing member 88 carried by the door is moved outv o engagement with the contact members 40 and el, with the result that the torque motor circuit between said rmembers 40 and @il is opened. Thus, it is' impossible for 'the torque motor to operate an inde endently act to raise the cam and acci entally permit closing of the circuit across the contacts 5 and 6 while the en the door is closed, it will 'he seen that circuit is again made across the contacts 40 and 41, permitting immediate loperation of the torque motor heretofore mentioned, which immediately acts to raise re 1, and act to` the cam 70 which releases its pressure on the roller 58, permitting said roller and its attached lever 57 to swing backto its normal or closed position disclosed in Fi re I,

causing `the elevator operating circuit to be 'closed across thecontacts 5 and 6 b the 'circuit-'closing member 29, and the lato :n-

forward toward the plate 2te engage wit member 33 to hold the door'in locked position.

.In the structure shown in Figures 5 and 7, the operation of the device is similar in all respects to 'that just described except that a sliding door 90 rather than a swinging door is utilized, and the operating rod 56 is located ina position at right angles to that shown in Figures 1,12, 3 and 6. In the structure shown 1n Figures 5 and 7, the rod 56a is used to form a pivotal support for the lever 19, the same being fixedly secured and rocking with the boss 20 formed on said lever by means of set screws 80. In this structure, the operating rod or shaft 56a is at right angles to its former position described with res ect to Figures i, 2, 3 and 6, said lever 56 ing in the structure just described directlyv fixed to the lever 19 by the set screws 80.

It will be seen that in the Astructure described, a substantial and sturdy arrangement of the partey is provided without re-` sorting to a complex arrangement lilzel to be rendered 'inoperative by weer or ot erwise. Through the utilization of resilient self-ali ing electrical contacts such as is herein eseribed, a wiping, self-cleaning electrical contact between the parts is provided.

While I have shown e circuit-closing member 38 as being fixed and abutting against resiliently mounted contacts, a res1 ient circuit-closing member such as at 29 may be employed to abut against rigid contacts where such a construction'is preferred. This and other embodiments of my invention may be readily made without departing from the spirit of my invention.

1. vIn an elevator door lock, two pairs of terminals, an elevator shaft door carrying a circuit-closing device adapted to connect the terminals of one pair, a rocking member havin a. pair of oppositely disposed arms, one o said arms carrying a resilient circuitclosing member adapted to connect the terminals of the other pair, a rojection on the elevator shaft door adapte to engage with the other arm when the door is in its closed position, a shaft for oscillating the rocking member and means carried by an elevator for oscillating said shaft. y

2. Inan elevator shaft door lock, an elevator V operating circuit having a pair of spaced terminals provided with inclined faces, a circuit-closing member adapted to oscillate about a pivot, said circuit-closing member having a tubular body, an insulating spring-pressed plunger member mounted therein, said plunger having an outer metallic terminal adapted to move across the inclined faces of the terminals with a wiping action and establish an electrical connec- 'tion between the terminals.

3, In a device of the character described,

, the oscillator a casing, a spring-pressed `member pivot.

ally mounted therein, a tubular arm carried by said lever, a pair of electric circuit terminals within the casing adjacent to said arm, a spring-pressed plunger within the tubular arm and partly `protruding' out of the same, a contact member on the protruding end of said plunger adapted to make a wiping contact with said terminals, a finger on said rocking lever, an elevator shaft door having a latch member adapted to enter the casing and engage with said linger, a circuitclosing member carried by said door, a pair of electric circuit terminals within the casing and in the path of movement of the doorcarried circuit-closing member, an oscillating shaft for moving the rocking member against the tension 'of its spring, and lcam means carried by an elevator for moving said osciiiating shaft.

e. In an elevator shaft door lock, a pair of spaced terminals connected in circuit with an elevator-operating means, vmeans for closing .said circuit across said terminalsy comprlsmg a rocker member provided with a contact, an elevator shaft door carrying a protruding lock member adapted to engage with a portion of said rocker member when contact is established across said terminals, an elevator having a movable cam, electric means for operating said cam, a pair' of terminals in circuit with said cam-operating means, and circuit-closing means carried by the door for closing circuit between the last mentioned terminals when the door is in its closed position.

5. In an elevator door lock, a casing having a back plate and spaced side walls, a rocking shaft pivoted between said side walls, an oscillating member on said shaft, said member having a tubular arm, a contact-making member resiliently mounted in and projecting out of the end of said arm, a pair of contacts secured on the back wall ofthe casing, said contacts being adapted to be bridged by the contact-making member when the arm in which the same is mounted is moved about its axis toward the rear wall of the casing, a locking arm projecting from member adapted to engage with a door atch when said varm is thrust away from the rear wall of the casing, and resilient means disposed 4between the rear wall of the casing and said locking arm for normally forcing said arm away from said rear wall and in engagement with the door latch.

6. In an elevator door lock, a movable member provided with means for closing an elevator-operating electric circuit, an elevator door carrying a latch member and a circuit-closing member, locking means on the movable member for engaging with the latch member co-incidently with the closing of the elevator-operating circuit, cam means carried by an elevator for opening the elevatoroperatng circuit and simultaneously freeing the elevator door latch from its enga ment with the locking means on the mova 1e 5 member, and a. pair of contacts wired in the cam-operating circuit, which contacts are adaptedA to be bridged by the circuit-closing means carried by the door co-incidently with the closing of the elevator-oper circuit.

' 10 Signed at the city, county and tate of New York, this 7th day of December, 1928.

` HERBERT GLASER. 

